摘要:
The invention relates to a sterilized composition comprising at least one hyaluronic acid or biologically acceptable salt thereof, alone or in a mixture, and magnesium ascorbyl phosphate, in a ratio [HA]/[MAP] by mass of the amount of hyaluronic acid or salt thereof [HA] to the amount of magnesium ascorbyl phosphate [MAP] of greater than or equal to 1, the amount of magnesium ascorbyl phosphate being between 0.001% and 1% by weight, relative to the total weight of said composition, with an elastic component G′ which is retained or improved after sterilization and is between 5 and 400 Pa. It also relates to a composition of the invention which further includes dimethyl sulfone, to methods for producing same, and to uses thereof.
摘要:
A composition including at least one crosslinked or non-crosslinked hyaluronic acid, or one of its salts, and at least one water-soluble salt of sucrose octasulphate, to processes for the manufacture of said composition and to the use of said composition for the formulation of a viscosupplementation composition or for the formulation of a composition as a dermal filler or for the formulation of a cosmetic composition.
摘要:
A process for the simultaneous substitution and crosslinking of a polysaccharide via its hydroxyl functional groups, in an aqueous phase, which includes the following steps: a polysaccharide is placed in an aqueous medium, it is brought into the presence of at least one precursor of a substituent, it is brought into the presence of a crosslinking agent, the substituted and crosslinked polysaccharide is obtained and isolated, wherein process is carried out in the presence of a basic or acidic catalyst, the concentration of which is between 3.16×10−7 and 0.32 mol/L, and at a temperature of less than 60° C. In one embodiment, the polysaccharide is in the form of a gel or hydrogel which is used in particular as augmentation biomaterial.